Reproducing-stylus for talking-machines.



G. K. CHENEY.

BEPBODUGING STYLUS FOB, TALKING MAQHINES. APPLICATION FILED JUNE'G,1903.

91 5,936 7 Patented Mar. 23, 1909.

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- w INVENTOR /B ATTORNEY UNITED sT r s PATENT o roE;

GEORGE K. CHENEY, OF NEW YORK,

N. Y., Assicnoannmsmi assrenmun'rs, ro vision TALKING MACHINE COMTEANY,A companion QENEW JERSEY.

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machines arid consists more specifically of an improved form ofreproducer adapted for 1 use in connection with the sound recorddescribed and claimed in my co-pending application Serial No. 160,431filed June 6, 1903.'

The record referred to is preferably of the disk type having a spiralgroove cut or otherwise formed in its face and the record in the form ofa connected series of indentations contained on the thread -or thatportion of the surface of the diskremaining between the turns of thespiral groove. v The reproducer point is preferably of suit able form toengage both the record thread and'the groove on oneor both sidesthereof, it being thereby guided and'maintained in proper relation tothe record, also fed across the. disk as the latteris rotated.

By reducing the bearing. surface of the reproducer to; the extreme pointof the stylus and formingv the spiral guide groove with perfectly smoothwalls, unpleasant sounds,

such as harsh, shrill tones emigrating noises,

may be either entirely avoided, or so greatlyreduced as to be renderedunnoticeable.

The preferred form of reproducer embodyingmy invention, is illustratedin the accompanymg drawm s, throughout the several -view t ereof.

views of which 'ke. characters of reference indicate corresponding arts.

- In these drawings: perspective on" a greatly enlarged scale, showing aportion of a disk sound record and the re roduc'er point or stylus inoperative relatlon thereto. ,Fig, 2 is a vertical sectional view takencentrall .of the record thread, on the lines, .9 of Flg. 1.. Fig. 3 is.a detail view in erspective of the repro 4 is a vertical sectional duceroint, and 1 g.

Referring now to the drawings, -1, indicates the sound record, which maybe of the vdisk or cylinder type. A spiral groove 2, is

formed in the face of the disk 0! cylinder the record the form of aconnected Specification of Letters fatent. Application filed June e,1903. Serial no. 180,429;

igure 1 is a view in Patented March as, 1900:

. series or succession of indentations 3, is con-- tained on thatportion, 4, of the disk or cylinder surface remaining between the. turnsof the spiral groove. v

The reproducer oint or stylus 5, may be made of any suita )le material,such as steel orthe like, but owing to the necessity for frequentlyrenewing the same, when made of metal, I prefer to use sapphire orsimilar stone, which may be used repeatedly Without showin appreciablewear.

constructed, t e stylus stra dles the record strip, as shown in Fig. 1,and while free to move up and down in following the indentations of therecord, its lateralplay is limited.-

operate with the horizontally disposed surface of the rotating recorddisk, or it may be inclined either toward the rightvor left, asindicated by dotted lines in Fig. 2. k In use, it will be seen that asthe the g'rooveare perfriztly smooth, the surface thereof in passing incontact with one or. the

character and as the distance separating, these lugs may exceed'somewhatthe width of the-record strip, contact between the surface of the grooveand the lugs will only occur at intervals The stylus will/therefore havea' bearing normally on the record thread only at its extreme p0int,'andin consequence, the objectionable scratching or grating noises will beto a great extent overcome.

phonetically connected with t and feed automatically, it isprovidedwitli a bearing-surface, such lugs being adapted to ereof in anywell known or The hearing surface 6, of the stylus, is

i The recorder may be set vertically to co- 1 walls of these lugs arereferably em loyed and thusother of the guide lugs on the stylus, willnot produce noticeable sounds of an unpleasant The stylus or reproducingpoint may be mounted in operative relation with a suitable do not wishto he understood as limiting 119- undulations upon their tops or edges.

myself to the exact details of construction .shown and. described, asvarious changes "m ght be made without departing from the "SPIIIt andscope of my invention.

For example, the bearing surface of the stylus might be given more orless curvature to con form to a record strip having a rounded surface.My improved stylus may also be used in connection with a record thre..dhaving lateral undulations as well as those having All suchmodifications, however, I consider obvious and immaterial variations ofform and not of substance and still within the nieaning of the presentinvention.

Having, therefore, described my invention, I claim:

1. As an article of manufacture, a reproducing stylus for talkingmachines having a pair of longitudinal extensions, theinncr sides ofwhich are adapted to form guides for said stylus and having a portionlocated between said extensions adapted to guide and retain said stylusin position longitudinally and to contact for substantially its wholelength with the active surface of the record.

2. As an article of manufacture, a reproducing stylus for talkingmachines having a pair of longitudinal extensions, the sides of whichare adapted to form guides for said stylus and a portion located betweensaid extensions adapted to contact for substantially its whole lengthwith the active surface of the sound record.

3. As an article of manufacture, a repro du'cing stylus having a pair oflongitudinal extensions, the inner sides of which are adapted to formguides for said stylus and having an edge located between saidextensions to contact. for substantially its whole length with the topof an undulatory record thread.

4.'As a new article of manufacture, a reproducing stylus for talkingmachines notched to straddle the record thread and havmg a strai ht edgeengaging for substantlally its who e length the active surface of therecord, lateral pla of the stylus being 7 limited by the side wa s ofthe notch.

5. As a new article i of manufacture, a reproducmg stylus for talkingmachines, said stylus bem notched to straddle the record thread e151havin "a straight edge of approxnnately V.-shape cross section enanarticle i of I manufacture, a flattened rerproduclng stylus one end ofwhich is provide with a transverse notch, the bottom edge of said notchbeing sharpened to form a wedge-sha ed ortion to contact forsubstantially its w ole ength with the active surface of the record, theportions of said A stylus.

.surface of the record, and havin stylus adjacent either side of saidwedgesha ed portion forming guides to feed the sty us across the record.

7. As an article of manufacture, a fiattened reproducing stylus providedwith a substantlally rectangular notch in the end thereof, the bottom ofsaid notchx'being sharpened to form a wedge-shaped portion to contactfor substantially its whole length. with the active surface of therecord, the portions on either side of said wed e-shaped portion formingguides to feed the stylus across the record.

8. A reproducing stylus having its engaging extremity beveled down to astraight edge, the said beveled portion being situated between a pair ofadjacent surfaces project' ing beyond said edge.

9. A reproducing stylus havin the middle portion of its engaging endbeve ed down to a straight edge and its side portions projecting beyondsaid edge.

10. A stylus having a portion provided with a straight edge adapted L-oen 'agetho undulatory surface of the record an s aced projections forlimiting the lateral p ay of the stylus.

11. A reproducing stylus having a portion provided with a straight edge,and a ortion projecting beyond said edge to gui e said 12. A reproducingstylus having a portion rovided with an edge ada ted to contact forsubstantially its full lengt with the active s aced projections forlimiting the latera p ay of the stylus upon said surface.

'13. A reproducing stylus having a straight edge to enga e theundulatory surface of the record, and liaving means for limiting thelateral lay of said stylus.

14. g reproducing stylus having a substantially straight edge extendingsubstantially at ri ht angles to the longitudinal axis of said sty us,and having a ortion extending longitudinally of said sty us beyond saidedge to guide said stylus.

15. A reproducing stylus having an edge adapted to contact with theactive surface of the record, and having s aced projections for limitingthe lateral p ay of the stylus upon said surface.

16. The combination with a stylus of s aced projections for limiting thelateral p ay of the stylus.

June, 1903.

' GEORGE K. CHENEY.

Witnessesz J. E. Pnnnsor,

W. H. PUMPHREY.

Signed at New York, Y. this 4th day of v

